Automatic weighing and recording car-scale.



G. GOBTZ.

AUTOMATIC WEIGHING AND RECORDING GAR SCALE.

APPLIGATION FILED MAY 27, 1909.

Patented Aug. 29, 1911.

2 SHEETS-SHEET 1.

G. GOBTZ. AUTOMATIC WEIGHING AND RECORDING GAR SCALE.

Patented Aug. 29, 1911.

2 SHEETS-SHEET 2 APPLICATION FILED MAY 27, 1909. 1,001,635.

" Z Q the-printing wheel to the position for re- 5 "spring causesubstantial inaccuracies in the I 50 scale is weighing its full capacityload; so

UNITED STATES PATENT OFFICE.

.- GEORGE GOETZ; OF CHICAGO, ILLINOIS, ASSIGNOR T STfiEETER-AMETWEIGHING &

RECORDING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

AUTOMATIC WEIGHING AND RECORDING CAR-SCALE.

Application filed May 27,

To all whom it may concern: I

Be itknown that I-, Gn'onon Goe'rz, a citizen of the United States,residing in Chi-- cage, in the county of Cook and State of Sf'Illinois,have invented a new anduseful Improvement, in Automatic \Veighing and'Recording Car-Scales, of which the following is a specification.Myinve'ntion relates to scales-"for auto- 0 matically weighing andrecording weights bf cars, andnjio're particularly to improve-- mentsupon the automatic weighing and i -ecording ca'r scales of my Patents-Nos. 651,845, 778,358 and 778,359, In the weigh- 5 itig and; recording'car scales o'f' iny said "'i'fprior patents, the scale'hearn. isconnected "with a counterbalance spring through 'a rack liar, the "teethof which mesh with .a gear on the printing -wheel shaft and thus turnscording the true weight of the car on the scale platform; and heretoforein practical operation. ery slight changes in tent eraturehy expansionor contraction o. the

operation of the weighing and recording "mechanism "as a' very slighto'r infinitesimal movement of the rack "h'ar; represents a va riation inweight: of the car of'lnanyvpounds. And as a consequence, 'for accurate"weighing, tlie conne1ction between the counterbalance spring and rackbar requires frequent adjustment to compensate forehanges of temperatureduring the day as well as for. different seasons of the year.

The object -.f.my'invention is to provide a simple, e \lQllt andreliable means for obviating his defect in operation. This object orresult, I accomplish, and herein. my invention consists, bycooperatively con hining with the scale heam, printing whee rack andgear, a compensating spring and compensating weight interposed in theconnection between the connterbalanec spring and rack lHlI in suchmanner that the compensating weight maintains the counter balance springinitially extended under the normal load of say, sixteen ponmls,'whichthe connterhalam'ze spring exerts when the that an) variation orcontraction or elongation by changes of tem n-ratnrc of thecounterlmlance spring will liefully counteracted liy a correspont'lingvariation, contraction or elongation in the compensating I Specificationof Letters Patent. Patented Aug. 29, 1911.

1909. Serial No. 498,779.

spring. The compensating spring is connected at its lower end to theframe or stationary support and at its upper end to the counterbalancespring, and the middle point or line between the two springs thusremains constantly on the same level or stationary, whatever variationsin temperature may occur; as any temperature contraction of the lowerspring tends to pull the compensating weight down, while the corresponding temperature contraction of the upper spring tends to pullthecompensating weight upward 'by an equal amount: thus alawysmaintaining-the compensating weight {lt tll same level or point; andl'heaction is precisely the same but the reverse when a temperatureelongation or expansion of the spr ngs occurs.

My invention also consists in the novel construction of parts anddevices and in the novel combinations of parts and devices herein shownand described and more par-' ticularly'specified in the claims.

In theaccompanying drawing forming a,

pa'rt of this specification, I have only shown those portions of my carweighing and recording scale to which my presentimprovementsparticularly relate, and l would refer to the specificationand drawings of my said prior patents for a full description of theconstruction and ()l'Jt-llllilOll of'the other portions of the.apparatus, suchother portions heing preferablyconstructed substantiallyin accordance with the speciliation and drawings of one or the other ofmy said prior patents. I

ln said drawing, Figure 1 is a side devation partly in vertical sectionof a weighing and recording car scale embodying my intention, showing,however, only that portion of the complete appamitus to which myinvention relates. Fig. 2 is a front ele 'ition, partly in verticalsection on line 2-2 of Fig. '1. Fig. 3 is a detail section on line 3-3ofl ig. 4. Fig. 4 is a detail horizontal section on line t- 4 of Fig. 3and-Fig. :"i is a detail horizontal section on line 5-5 of Fig. 2.

in the. drawing. A represents the frame of the weighing and recordingcar scale. B the scale heam connected with the scale platform .thronghcust't'nnary connecting links and levers B B". (l is the dash-pot, thepiston stem (1 or" which is connected with the scale heam.

D is the printing or recording.

with a gear (Z which meshes with the rack E having connections E withthe scale -which the counterbalance spring exerts Y beam. 1* is thecounterbalance spring having a connection f at one end with thestationary frame A, and provided with an adjusting device 7 for cuttingout or forcing solid one or. more coils of the spring to vary its lengthas may be required, and connected at its other end'by suitable'connections or rods 7" with the scale beam B, preferably through therack E. All these parts are ormay be of any suitable construction andneed no further description, being preferably constructed and operatingsubstantially in accordance with one or the other of my'said priorpatents.

G is the compensating spring and H the compensating weight which holdsthe counterbalance spring extended under an initial load or tension,preferably substantially that when under maximum tension or whenweighing the full capacity-Stet the scale. That is to say, if thecounterbalance spring F exertsa tension of sixteen 'pou'nds against theend of the scale beam when weighing the maximum load or'full capacity ofthe scale, the compensating weight is alsolpreferably sixteen pounds,and thus holds or maintains the counterbalance spring F ex-' tendedfunder an initial tension of sixteen pounds. The compensating-spring Giscon-v nected at one end to the-frame A, or other stationary support,preferably by 'abolt h, and it is-provided with a cut out' or adjustving devic'e 1'1. toxenable. one or more-of its coils to be out out'orforced' solid, this cut out device it being preferably similar. in

construction and operation to the cut out or adjusting device f employedin the counterbalance spring F. At their meeting ends, thecounterbalance spring F and compensating spring G are preferablyconnected together by-mcans of a pair of connecting plates K K securedtogether by screws K, and provided each with a ball bearing socket orrace K furnished with balls K and a rotatable coupling head K having aslot K and pin K for connection withthe bent or hooked ends f g of thesprings F, G.

This ball bearing connection between the ends of the springs enables thesprings to freely turn without binding as the springs contract or expandunder changes of temperature. v

I cla1m:'

1. The combination with a scale beam, of. a counterbalance springconnected thereto, and a compensating spring and a compensating weight,holding the counterbalance spring under an initial tension, and ballbearing connections bet-ween the meeting ends of said springs,substantially as specified.

2. The combination with a scale beam, of a counterbalance springconnected thereto, and a compensating spring and a compensating weight,holding the counterbalance.

spring under aninit'ial tension, a pair of connecting. plat/es betweenthe meeting ends of said springs and a pair of coupling heads forcoupling said springs to said connecting plates, substantially asspecified.'

. '3. The combination with a sealbeam, of a counterbalance springconnected thereto,

and.a.compensatin spring and a compensating weight, 1101 ing thecounterbalancespring under an initial tension, a pair of connecting.plates between the meeting ends of said springs and a pair of couplingheads for coupling said springs to said'connecting plates, said coupling.heads and plates having ballbearings, substantially as specified.

- GEORGE GOETZ. \Vitnesscs: PEARL ABRAMS, H. M. MUNDAY.

